With the actions defined, the third part covers a step that comes before any strength verification: checking that the model responds in a physically consistent way.
Deflection limits
For the vertical deflection of the purlins the “200 f/L” command is used, passed when the ratio is below 1. For horizontal displacements, the maximum of 6.83 cm is compared with the H/150 limit (7.9 cm for a height of 11.85 m): check satisfied.
Geometric non-linearity: P-Delta analysis
Second-order effects are assessed with P-Delta analysis at SLU and SLV in both directions. The coefficients stay well within limits, confirming the structure is not sensitive to global instability.
Effects of deformations: buckling
Finally, buckling analysis checks the behaviour with respect to instability phenomena.